Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)

Fernando Gont <fgont@si6networks.com> Wed, 06 January 2021 18:56 UTC

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To: Ted Lemon <mellon@fugue.com>
Cc: Gert Doering <gert@space.net>, IPv6 Operations <v6ops@ietf.org>, Philip Homburg <pch-ipv6-ietf-7@u-1.phicoh.com>, ipv6@ietf.org
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From: Fernando Gont <fgont@si6networks.com>
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Date: Wed, 6 Jan 2021 14:46:04 -0300
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Subject: Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)
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On 6/1/21 14:33, Ted Lemon wrote:
> On Jan 6, 2021, at 12:26 PM, Fernando Gont <fgont@si6networks.com 
> <mailto:fgont@si6networks.com>> wrote:
>> e.g., for thinks like mDNS, you'd only bind() and listen on your ULAs, 
>> if any.
> 
> mDNS is link-local, so you can actually use your LLA for that (and we 
> do). 

The problem with link-locals is that having to specify the "zone id" 
with the "Addr%iface" thing at times is nto friendly with some apps.



> But e.g. if you are using SRP 
> (https://tools.ietf.org/html/draft-ietf-dnssd-srp-07), then it makes 
> sense to push your GUA and your ULA and bind to both, or to INADDR_ANY 
> (if you want to be globally reachable). I would expect the SRP server to 
> do the work of figuring out on which DNS server to publish the ULA and 
> on which to publish the GUA.

... in which case the server would have to be able to infer address 
properties, using macros or libraries such as the one in 
https://tools.ietf.org/html/draft-gont-6man-ipv6-ula-scope-00#section-5.1


-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492